Esto incluye a librerías externas basadas en Pydantic como <abbr title="Object-Relational Mapper">ORM</abbr>s y <abbr title="Object-Document Mapper">ODM</abbr>s para bases de datos.

		signatureVersion = signV4Algorithm
	}

	var authtype string
	switch authType {
	case authTypePresignedV2, authTypePresigned:
		authtype = "REST-QUERY-STRING"
	case authTypeSignedV2, authTypeSigned, authTypeStreamingSigned:
		authtype = "REST-HEADER"
	case authTypePostPolicy:
		authtype = "POST"
	}

	args := map[string][]string{
		"CurrentTime":      {currTime.Format(time.RFC3339)},

### <a href="https://www.django-rest-framework.org/" class="external-link" target="_blank">Django REST Framework</a>

Django REST framework foi criado para ser uma caixa de ferramentas flexível para construção de APIs web utilizando Django por baixo, para melhorar suas capacidades de API.

# Aprender

Aquí están las secciones introductorias y los tutoriales para aprender **FastAPI**.

   * instead (but note that it does not guarantee which tied minimum element is returned).
   *
   * @param a value to compare, returned if less than or equal to the rest.
   * @param b value to compare
   * @param c value to compare
   * @param rest values to compare
   * @throws ClassCastException if the parameters are not <i>mutually comparable</i> under this
   *     ordering.
   */
  @ParametricNullness

---

"_We adopted the **FastAPI** library to spawn a **REST** server that can be queried to obtain **predictions**. [for Ludwig]_"

```Python hl_lines="2-3  23"
{!../../docs_src/wsgi/tutorial001.py!}
```

## Es ansehen

Jetzt wird jede Anfrage unter dem Pfad `/v1/` von der Flask-Anwendung verarbeitet.

Und der Rest wird von **FastAPI** gehandhabt.

Wenn Sie das mit Uvicorn ausführen und auf <a href="http://localhost:8000/v1/" class="external-link" target="_blank">http://localhost:8000/v1/</a> gehen, sehen Sie die Response von Flask:

```txt

### <a href="https://www.django-rest-framework.org/" class="external-link" target="_blank">Django REST Framework</a>

Django REST framework was created to be a flexible toolkit for building Web APIs using Django underneath, to improve its API capabilities.

Lo puedes ver directamente en: <a href="http://127.0.0.1:8000/openapi.json" class="external-link" target="_blank">http://127.0.0.1:8000/openapi.json</a>.

Esto te mostrará un JSON que comienza con algo como:

```JSON
{
    "openapi": "3.0.2",
    "info": {
        "title": "FastAPI",
        "version": "0.1.0"
    },
    "paths": {
        "/items/": {

# Exceptions - `HTTPException` and `WebSocketException`

These are the exceptions that you can raise to show errors to the client.

When you raise an exception, as would happen with normal Python, the rest of the execution is aborted. This way you can raise these exceptions from anywhere in the code to abort a request and show the error to the client.

You can use:

* `HTTPException`
* `WebSocketException`